[INFO] cloning repository https://github.com/e10ulen/rust_mod
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/e10ulen/rust_mod" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fe10ulen%2Frust_mod", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fe10ulen%2Frust_mod'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b49d244cfb29a21f47d91231a4210abe24b2376a
[INFO] testing e10ulen/rust_mod against try#33835004928d3bf65db4d4712e1330766263b0bd for pr-155739-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fe10ulen%2Frust_mod" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/e10ulen/rust_mod
[INFO] finished tweaking git repo https://github.com/e10ulen/rust_mod
[INFO] tweaked toml for git repo https://github.com/e10ulen/rust_mod written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/e10ulen/rust_mod on toolchain 33835004928d3bf65db4d4712e1330766263b0bd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/e10ulen/rust_mod already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6725903bed4ada09f12f183ba77848c0fdcc0bcdd0bdc99ac77d82cb4474ea41
[INFO] running `Command { std: "docker" "start" "-a" "6725903bed4ada09f12f183ba77848c0fdcc0bcdd0bdc99ac77d82cb4474ea41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6725903bed4ada09f12f183ba77848c0fdcc0bcdd0bdc99ac77d82cb4474ea41", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6725903bed4ada09f12f183ba77848c0fdcc0bcdd0bdc99ac77d82cb4474ea41", kill_on_drop: false }`
[INFO] [stdout] 6725903bed4ada09f12f183ba77848c0fdcc0bcdd0bdc99ac77d82cb4474ea41
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5583b1079c1a9cb79f7812bb78f8098b15f9379e9f56f29480a93ea6d37d1315
[INFO] running `Command { std: "docker" "start" "-a" "5583b1079c1a9cb79f7812bb78f8098b15f9379e9f56f29480a93ea6d37d1315", kill_on_drop: false }`
[INFO] [stderr]    Compiling hello v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `elt`
[INFO] [stdout]   --> src/main.rs:30:29
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn push_back(&mut self, elt: T) {
[INFO] [stdout]    |                             ^^^ help: if this is intentional, prefix it with an underscore: `_elt`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `elt`
[INFO] [stdout]   --> src/main.rs:36:30
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn push_front(&mut self, elt: T) {
[INFO] [stdout]    |                              ^^^ help: if this is intentional, prefix it with an underscore: `_elt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/main.rs:45:19
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/main.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Node<T> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `wddd` is never read
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct DoublyLinkedList<T> {
[INFO] [stdout]   |        ---------------- field in this struct
[INFO] [stdout] 8 |     wddd:T
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `pop_back` and `pop_front` are never used
[INFO] [stdout]   --> src/main.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl<T> DoublyLinkedList<T> {
[INFO] [stdout]    | --------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 18 |     fn pop_back(&mut self) -> Option<T> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |     fn pop_front(&mut self) -> Option<T> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "5583b1079c1a9cb79f7812bb78f8098b15f9379e9f56f29480a93ea6d37d1315", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5583b1079c1a9cb79f7812bb78f8098b15f9379e9f56f29480a93ea6d37d1315", kill_on_drop: false }`
[INFO] [stdout] 5583b1079c1a9cb79f7812bb78f8098b15f9379e9f56f29480a93ea6d37d1315
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 580f395809d8262d9150c1fc4498d652f28560b25c318980f239bed81e532f6e
[INFO] running `Command { std: "docker" "start" "-a" "580f395809d8262d9150c1fc4498d652f28560b25c318980f239bed81e532f6e", kill_on_drop: false }`
[INFO] [stderr]    Compiling hello v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `elt`
[INFO] [stdout]   --> src/main.rs:30:29
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn push_back(&mut self, elt: T) {
[INFO] [stdout]    |                             ^^^ help: if this is intentional, prefix it with an underscore: `_elt`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `elt`
[INFO] [stdout]   --> src/main.rs:36:30
[INFO] [stdout]    |
[INFO] [stdout] 36 |     fn push_front(&mut self, elt: T) {
[INFO] [stdout]    |                              ^^^ help: if this is intentional, prefix it with an underscore: `_elt`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/main.rs:45:19
[INFO] [stdout]    |
[INFO] [stdout] 45 |     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/main.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Node<T> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `wddd` is never read
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct DoublyLinkedList<T> {
[INFO] [stdout]   |        ---------------- field in this struct
[INFO] [stdout] 8 |     wddd:T
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `pop_back` and `pop_front` are never used
[INFO] [stdout]   --> src/main.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl<T> DoublyLinkedList<T> {
[INFO] [stdout]    | --------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 18 |     fn pop_back(&mut self) -> Option<T> {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 24 |     fn pop_front(&mut self) -> Option<T> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.21s
[INFO] running `Command { std: "docker" "inspect" "580f395809d8262d9150c1fc4498d652f28560b25c318980f239bed81e532f6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "580f395809d8262d9150c1fc4498d652f28560b25c318980f239bed81e532f6e", kill_on_drop: false }`
[INFO] [stdout] 580f395809d8262d9150c1fc4498d652f28560b25c318980f239bed81e532f6e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+33835004928d3bf65db4d4712e1330766263b0bd" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2d82d8c243d9347bf0afce2bca4507c836e2254256d806df13a8d1eece358afb
[INFO] running `Command { std: "docker" "start" "-a" "2d82d8c243d9347bf0afce2bca4507c836e2254256d806df13a8d1eece358afb", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused variable: `elt`
[INFO] [stdout] running 0 tests
[INFO] [stderr]   --> src/main.rs:30:29
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 30 |     fn push_back(&mut self, elt: T) {
[INFO] [stdout] 
[INFO] [stderr]    |                             ^^^ help: if this is intentional, prefix it with an underscore: `_elt`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `elt`
[INFO] [stderr]   --> src/main.rs:36:30
[INFO] [stderr]    |
[INFO] [stderr] 36 |     fn push_front(&mut self, elt: T) {
[INFO] [stderr]    |                              ^^^ help: if this is intentional, prefix it with an underscore: `_elt`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `f`
[INFO] [stderr]   --> src/main.rs:45:19
[INFO] [stderr]    |
[INFO] [stderr] 45 |     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
[INFO] [stderr]    |                   ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Node` is never constructed
[INFO] [stderr]  --> src/main.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct Node<T> {
[INFO] [stderr]   |        ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `wddd` is never read
[INFO] [stderr]  --> src/main.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | struct DoublyLinkedList<T> {
[INFO] [stderr]   |        ---------------- field in this struct
[INFO] [stderr] 8 |     wddd:T
[INFO] [stderr]   |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: methods `pop_back` and `pop_front` are never used
[INFO] [stderr]   --> src/main.rs:18:8
[INFO] [stderr]    |
[INFO] [stderr] 11 | impl<T> DoublyLinkedList<T> {
[INFO] [stderr]    | --------------------------- methods in this implementation
[INFO] [stderr] ...
[INFO] [stderr] 18 |     fn pop_back(&mut self) -> Option<T> {
[INFO] [stderr]    |        ^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 24 |     fn pop_front(&mut self) -> Option<T> {
[INFO] [stderr]    |        ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `hello` (bin "hello" test) generated 6 warnings (run `cargo fix --bin "hello" -p hello --tests` to apply 3 suggestions)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/hello-d2d4170fb283d029)
[INFO] running `Command { std: "docker" "inspect" "2d82d8c243d9347bf0afce2bca4507c836e2254256d806df13a8d1eece358afb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2d82d8c243d9347bf0afce2bca4507c836e2254256d806df13a8d1eece358afb", kill_on_drop: false }`
[INFO] [stdout] 2d82d8c243d9347bf0afce2bca4507c836e2254256d806df13a8d1eece358afb
